SystemUIApplication.java revision 9209c9cd9a6f779d0d9d86f9b2e368df564fa6bb 
1/*
2 * Copyright (C) 2014 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License
15 */
16
17package com.android.systemui;
18
19import android.app.Application;
20import android.content.BroadcastReceiver;
21import android.content.Context;
22import android.content.Intent;
23import android.content.IntentFilter;
24import android.content.res.Configuration;
25import android.os.SystemProperties;
26import android.util.Log;
27
28import java.util.HashMap;
29import java.util.Map;
30
31/**
32 * Application class for SystemUI.
33 */
34public class SystemUIApplication extends Application {
35
36    private static final String TAG = "SystemUIService";
37    private static final boolean DEBUG = false;
38
39    /**
40     * The classes of the stuff to start.
41     */
42    private final Class<?>[] SERVICES = new Class[] {
43            com.android.systemui.tuner.TunerService.class,
44            com.android.systemui.keyguard.KeyguardViewMediator.class,
45            com.android.systemui.recents.Recents.class,
46            com.android.systemui.volume.VolumeUI.class,
47            com.android.systemui.statusbar.SystemBars.class,
48            com.android.systemui.usb.StorageNotification.class,
49            com.android.systemui.power.PowerUI.class,
50            com.android.systemui.media.RingtonePlayer.class,
51            com.android.systemui.keyboard.KeyboardUI.class,
52    };
53
54    /**
55     * Hold a reference on the stuff we start.
56     */
57    private final SystemUI[] mServices = new SystemUI[SERVICES.length];
58    private boolean mServicesStarted;
59    private boolean mBootCompleted;
60    private final Map<Class<?>, Object> mComponents = new HashMap<Class<?>, Object>();
61
62    @Override
63    public void onCreate() {
64        super.onCreate();
65        // Set the application theme that is inherited by all services. Note that setting the
66        // application theme in the manifest does only work for activities. Keep this in sync with
67        // the theme set there.
68        setTheme(R.style.systemui_theme);
69
70        IntentFilter filter = new IntentFilter(Intent.ACTION_BOOT_COMPLETED);
71        filter.setPriority(IntentFilter.SYSTEM_HIGH_PRIORITY);
72        registerReceiver(new BroadcastReceiver() {
73            @Override
74            public void onReceive(Context context, Intent intent) {
75                if (mBootCompleted) return;
76
77                if (DEBUG) Log.v(TAG, "BOOT_COMPLETED received");
78                unregisterReceiver(this);
79                mBootCompleted = true;
80                if (mServicesStarted) {
81                    final int N = mServices.length;
82                    for (int i = 0; i < N; i++) {
83                        mServices[i].onBootCompleted();
84                    }
85                }
86            }
87        }, filter);
88    }
89
90    /**
91     * Makes sure that all the SystemUI services are running. If they are already running, this is a
92     * no-op. This is needed to conditinally start all the services, as we only need to have it in
93     * the main process.
94     *
95     * <p>This method must only be called from the main thread.</p>
96     */
97    public void startServicesIfNeeded() {
98        if (mServicesStarted) {
99            return;
100        }
101
102        if (!mBootCompleted) {
103            // check to see if maybe it was already completed long before we began
104            // see ActivityManagerService.finishBooting()
105            if ("1".equals(SystemProperties.get("sys.boot_completed"))) {
106                mBootCompleted = true;
107                if (DEBUG) Log.v(TAG, "BOOT_COMPLETED was already sent");
108            }
109        }
110
111        Log.v(TAG, "Starting SystemUI services.");
112        final int N = SERVICES.length;
113        for (int i=0; i<N; i++) {
114            Class<?> cl = SERVICES[i];
115            if (DEBUG) Log.d(TAG, "loading: " + cl);
116            try {
117                mServices[i] = (SystemUI)cl.newInstance();
118            } catch (IllegalAccessException ex) {
119                throw new RuntimeException(ex);
120            } catch (InstantiationException ex) {
121                throw new RuntimeException(ex);
122            }
123            mServices[i].mContext = this;
124            mServices[i].mComponents = mComponents;
125            if (DEBUG) Log.d(TAG, "running: " + mServices[i]);
126            mServices[i].start();
127
128            if (mBootCompleted) {
129                mServices[i].onBootCompleted();
130            }
131        }
132        mServicesStarted = true;
133    }
134
135    @Override
136    public void onConfigurationChanged(Configuration newConfig) {
137        if (mServicesStarted) {
138            int len = mServices.length;
139            for (int i = 0; i < len; i++) {
140                mServices[i].onConfigurationChanged(newConfig);
141            }
142        }
143    }
144
145    @SuppressWarnings("unchecked")
146    public <T> T getComponent(Class<T> interfaceType) {
147        return (T) mComponents.get(interfaceType);
148    }
149
150    public SystemUI[] getServices() {
151        return mServices;
152    }
153}
154